Rotary joint for medium transmission

Abstract

The utility model discloses a rotary joint for medium transmission, and belongs to the field of mechanical equipment. The rotary connector comprises a supporting assembly and a medium conveying pipeline assembly. The supporting assembly comprises a supporting part and a plurality of supporting wheels, the multiple supporting wheels are rotatably arranged on the supporting part, and a supporting space is formed among the multiple supporting wheels; the medium conveying pipeline assembly comprises an air inlet head, a medium pipeline and an air outlet head, the air inlet head is installed on the supporting part, the medium pipeline is inserted in the supporting space and rotatably connected with the air inlet head, one end of the medium pipeline communicates with the air inlet head, and the air outlet head is fixedly connected with the medium pipeline and communicates with the other end of the medium pipeline. The rotary joint for medium transmission provided by the embodiment of the utility model not only can form a reliable medium transmission channel for a rotary mechanism, but also can bear the load generated in the high-speed rotation process of the rotary mechanism, and meets the rotation strength of the rotary mechanism.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mechanical equipment, concretely relates to a rotary joint for medium transmission. BACKGROUND

[0002] The rotary joint is a kind of connecting sealing device that fluid medium is input from static system to rotating mechanism.The rotary joint usually includes static end and rotating end, and the static end and rotating end are sealed by sealing element, the rotary joint has medium transmission channel inside, the static end is communicated with static system, the rotating end is communicated with rotating mechanism, and the rotating mechanism drives the rotating end to rotate in the rotating process, and the static end remains stationary in the process, to transmit the fluid medium in static system to rotating mechanism through medium transmission channel.

[0003] However, the load generated by rotating mechanism in high-speed rotating process is large, which causes the rotating end of rotary joint to be difficult to bear the rotating intensity of rotating mechanism, thereby affecting the sealing effect between static end and rotating end. UTILITY MODEL CONTENT

[0004] In view of the above defects or improvement needs of prior art, the utility model provides a rotary joint for medium transmission, which aims at not only forming reliable medium conveying channel for rotating mechanism, but also bearing the load generated by rotating mechanism in high-speed rotating process, to meet the rotating intensity of rotating mechanism.

[0005] To achieve the above purpose, the utility model provides a rotary joint for medium transmission, which includes support assembly and medium transmission pipeline assembly.

[0006] The support assembly includes support part and multiple support wheels, and multiple support wheels are rotatably arranged on the support part, and support space is formed between multiple support wheels.

[0007] The medium transmission pipeline assembly includes air inlet head, medium pipeline and air outlet head, the air inlet head is installed on the support part, the medium pipeline is inserted in the support space to support the outer periphery of the medium pipeline by multiple support wheels, the medium pipeline is rotatably connected with air inlet head, one end of the medium pipeline is communicated with the air inlet channel of air inlet head, and the air outlet head is fixedly connected with the medium pipeline, and the air outlet channel of air outlet head is communicated with the other end of the medium pipeline.

[0008] Optionally, the medium transmission pipeline assembly further includes rotary flange, the rotary flange is sleeved on the medium pipeline, and the rotary flange is inserted in the support space, and the outer periphery of rotary flange is in sliding contact with the outer periphery of each support wheel.

[0009] Optionally, the outer periphery of the rotating flange has an annular groove, and the outer periphery of each of the supporting wheels is clamped in the annular groove.

[0010] Optionally, the medium pipeline has a first channel and a second channel, the air inlet head has a first air inlet channel and a second air inlet channel, the air outlet head has a first air outlet channel and a second air outlet channel, and two ends of the first channel are respectively communicated with the first air inlet channel and the first air outlet channel, and two ends of the second channel are respectively communicated with the second air inlet channel and the second air outlet channel.

[0011] Optionally, the medium pipeline comprises an inner shaft and an outer shaft, the outer shaft is coaxially sleeved outside the inner shaft, both ends of the inner shaft extend out of the outer shaft, the first channel is located in the inner shaft and penetrates both ends of the inner shaft, and the second channel is a plurality of channels which are arranged in the outer shaft in a ring shape along the outer periphery of the inner shaft and penetrate both ends of the outer shaft.

[0012] One end of the air inlet head and one end of the air outlet head are respectively sleeved on the end of the inner shaft, the other end of the air inlet head and the other end of the air outlet head are respectively sleeved on the end of the outer shaft, the air inlet head, the inner shaft and the outer shaft form a first communication space, the first communication space is respectively communicated with the second air inlet channel and one end of each of the second channels, and the air outlet head, the inner shaft and the outer shaft form a second communication space, the second communication space is respectively communicated with the second air outlet channel and the other end of each of the second channels.

[0013] Optionally, O-shaped sealing rings are respectively arranged between one end of the air inlet head and the end of the inner shaft, between the other end of the air inlet head and the end of the outer shaft, between one end of the air outlet head and the end of the inner shaft, and between the other end of the air outlet head and the end of the outer shaft.

[0014] Optionally, the supporting part comprises a supporting frame and a fixing plate, the fixing plate is arranged on the supporting frame, the air inlet head is arranged on the fixing plate, and a plurality of the supporting wheels are arranged on the supporting frame.

[0015] Optionally, the supporting frame comprises a base, a top seat and two connecting plates, the two connecting plates are arranged in parallel and at intervals, both ends of each of the connecting plates are respectively detachably connected to the base and the top seat, and the fixing plate is arranged on the base.

[0016] The number of the supporting wheels is four, two of the supporting wheels are arranged on the base, and the other two of the supporting wheels are arranged on the top seat.

[0017] Optionally, at least one bearing is arranged in each of the supporting wheels, and each of the bearings is arranged on the supporting part through a positioning pin.

[0018] Optionally, the air inlet head and the medium pipeline are connected through a rotating bearing.

[0019] The above technical features can be combined with each other as long as they do not conflict with each other.

[0020] Overall, the above technical solutions conceived by the utility model have the following beneficial effects compared with the prior art:

[0021] For the rotary joint for medium transmission provided by the utility model, the air inlet head is installed on the support part, the medium pipeline is rotatably connected with the air inlet head, one end of the medium pipeline is in communication with the air inlet passage of the air inlet head, the air outlet head is fixedly connected with the medium pipeline, and the air outlet passage of the air outlet head is in communication with the other end of the medium pipeline, so that the air inlet head, the medium pipeline and the air outlet head are sequentially communicated, and a reliable medium conveying passage is formed for the rotating mechanism (wherein the medium is input through the air inlet passage of the air inlet head). Correspondingly, the rotating mechanism drives the medium pipeline to rotate, and the air inlet head remains in a stationary state, avoiding rotation of the air inlet pipeline.

[0022] Further, a plurality of support wheels are rotatably arranged on the support part, and a support space is formed between the plurality of support wheels, and the medium pipeline is inserted into the support space, so that the rotating medium pipeline is supported by the plurality of movably arranged support wheels, which not only reduces friction and ensures smooth rotation of the medium pipeline, but also bears the load generated by the rotating mechanism during high-speed rotation, meeting the rotation strength of the rotating mechanism.

[0023] That is, the rotary joint for medium transmission provided by the utility model embodiment not only forms a reliable medium conveying passage for the rotating mechanism, but also bears the load generated by the rotating mechanism during high-speed rotation, meeting the rotation strength of the rotating mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of a rotary joint for medium transmission provided by the utility model embodiment;

[0025] Figure 2 is a structural schematic view of a medium transmission pipeline assembly provided by the utility model embodiment;

[0026] Figure 3 is a sectional view of the medium transmission pipeline assembly provided by the utility model embodiment;

[0027] Figure 4 is an exploded schematic view of a support assembly provided by the utility model embodiment.

[0028] In all the drawings, the same reference signs represent the same technical features, specifically:

[0029] 1, support assembly; 11, support part; 111, support frame; 1111, base; 1112, top seat; 1113, connecting plate; 112, fixed plate; 12, support wheel; 121, bearing; 122, positioning pin; 123, check ring; 2, medium transmission pipeline assembly; 21, air inlet head; 211, first air inlet pipe; 212, second air inlet pipe; 22, medium pipeline; 221, first channel; 222, second channel; 223, inner shaft; 224, outer shaft; 23, air outlet head; 231, first air outlet pipe; 232, second air outlet pipe; 24, rotating flange; 241, annular groove; 26, O-shaped sealing ring; 27, sealing gasket; 28, rotating bearing; 3, first communication space; 4, second communication space. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model clearer and more understandable, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0031] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through the indirect connection of intermediate medium, can be the communication of two element interiors or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the second feature, or simply indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the second feature, or simply indicate that the first feature is lower than the second feature in horizontal height.

[0035] Embodiment:

[0036] Figure 1 is a structural schematic view of a rotary joint for medium transmission provided by the utility model embodiment, as shown in Figure 1 The rotary joint comprises a support assembly 1 and a medium transmission pipeline assembly 2.

[0037] The support assembly 1 comprises a support part 11 and a plurality of support wheels 12, the plurality of support wheels 12 are rotatably arranged on the support part 11, and a support space is formed between the plurality of support wheels 12.

[0038] Figure 2 is a structural schematic view of the medium transmission pipeline assembly provided by the utility model embodiment, as shown in Figure 2 The medium transmission pipeline assembly 2 comprises an air inlet head 21, a medium pipeline 22 and an air outlet head 23, the air inlet head 21 is installed on the support part 11, the medium pipeline 22 is inserted and mounted in the support space to support the outer periphery of the medium pipeline 22 through the plurality of support wheels 12, the medium pipeline 22 is rotatably connected with the air inlet head 21, one end of the medium pipeline 22 is communicated with the air inlet passage of the air inlet head 21, the air outlet head 23 is fixedly connected with the medium pipeline, and the air outlet passage of the air outlet head 23 is communicated with the other end of the medium pipeline 22.

[0039] The utility model discloses a kind of rotary joints for medium transmission, since air inlet head 21 is installed on support part 11, medium pipeline 22 is rotatably connected with air inlet head 21, and the end of medium pipeline 22 is communicated with the air inlet passage of air inlet head 21, air outlet head 23 is fixedly connected with medium pipeline 22, and the air outlet passage of air outlet head 23 is communicated with the other end of medium pipeline 22, to realize the communication of air inlet head 21, medium pipeline 22 and air outlet head 23 in turn, to form reliable medium conveying channel to rotary mechanism (wherein, medium is input by the air inlet passage of air inlet head), correspondingly, rotary mechanism is brought to medium pipeline rotation, and air inlet head remains stationary state, avoid air inlet pipeline rotation.

[0040] Further, a plurality of support wheels 12 are rotatably arranged on the support part 11, and a support space is formed between the plurality of support wheels 12, and the medium pipeline 22 is inserted and mounted in the support space, so that the support wheels 12 movably arranged can support the rotating medium pipeline 22, which not only reduces friction and ensures smooth rotation of the medium pipeline 22, but also can withstand the load generated by the rotating mechanism during high-speed rotation, meeting the rotation strength of the rotating mechanism.

[0041] That is, the utility model embodiment provides a kind of rotary joints for medium transmission, not only can form reliable medium conveying channel to rotary mechanism, but also can withstand the load generated by the rotating mechanism during high-speed rotation, meeting the rotation strength of the rotating mechanism.

[0042] Exemplarily, the air inlet head 21 and the medium pipeline 22 are connected by the rotary bearing 28. During rotation, the air inlet head 21 does not rotate with the medium pipeline 22, and the setting of the rotary bearing 28 can avoid the frequent friction between the air inlet head 21 and the medium pipeline 22, which causes wear.

[0043] Continuing to refer to Figure 2 In the embodiment, the medium transmission pipeline assembly 2 further includes a rotary flange 24, which is sleeved on the medium pipeline 22 and inserted and mounted in the support space, and the outer periphery of the rotary flange 24 is in sliding contact with the outer periphery of each support wheel 12.

[0044] In the above embodiment, the rotary flange 24 serves as a connection for the rotating mechanism, and can act as a load-bearing rotary shaft of the rotating mechanism, avoiding direct connection of the rotating mechanism with the medium pipeline 22. Therefore, when maintenance of the medium transmission pipeline assembly 2 is required, the rotating mechanism can still be reliably arranged under the support of the support wheels 12 and the rotary flange 24, at which time only the medium transmission pipeline assembly 2 needs to be disassembled, without the need to disassemble the rotating mechanism.

[0045] Further, the outer periphery of the rotating flange 24 has an annular groove 241, and the outer periphery of each support wheel 12 is clamped in the annular groove 241. Since the rotating mechanism is mounted on the rotating flange 24, and the support wheel 12 is inserted into the annular groove 241 of the rotating flange 24, the rotating flange 24 and the rotating mechanism are limited and mounted by the support wheel 12, so as to avoid axial movement of the rotating flange 24 and the rotating mechanism along the medium pipeline 22 during rotation.

[0046] Figure 3 is a sectional view of the medium transmission pipeline assembly provided by the embodiment of the utility model, in combination with Figure 2 and Figure 3 It is shown that the medium pipeline 22 has a first channel 221 and a second channel 222, the air inlet head 21 has a first air inlet channel and a second air inlet channel, the air outlet head 23 has a first air outlet channel and a second air outlet channel, and the two ends of the first channel 221 are communicated with the first air inlet channel and the first air outlet channel respectively, and the two ends of the second channel 222 are communicated with the second air inlet channel and the second air outlet channel respectively. Wherein, the first air inlet channel, the first channel 221 and the second air outlet channel form a first medium conveying channel, and the second air inlet channel, the second channel 222 and the second air outlet channel form a second medium conveying channel, so as to finally realize double-channel medium conveying and meet different working conditions of the rotating mechanism.

[0047] In the embodiment, the medium pipeline 22 comprises an inner shaft 223 and an outer shaft 224, the outer shaft 224 is coaxially sleeved on the outer shaft 223, the two ends of the inner shaft 223 extend out of the outer shaft 224, the first channel 221 is located in the inner shaft 223 and penetrates the two ends of the inner shaft 223, and the second channel 222 is a plurality of channels and is arranged in the outer shaft in a ring-shaped manner along the outer periphery of the inner shaft 223 and penetrates the two ends of the outer shaft 224.

[0048] One end of the air inlet head 21 and one end of the air outlet head 23 are correspondingly sleeved on the end of the inner shaft 223, the other end of the air inlet head 21 and the other end of the air outlet head 23 are correspondingly sleeved on the end of the outer shaft 224, the air inlet head 21, the inner shaft 223 and the outer shaft 224 form a first communication space 3, the first communication space 3 is communicated with the second air inlet channel and one end of each second channel 222 respectively, the air outlet head 23, the inner shaft 223 and the outer shaft 224 form a second communication space 4, and the second communication space 4 is communicated with the second air outlet channel and the other end of each second channel 222 respectively.

[0049] In the above embodiment, the two ends of the air inlet head 21 and the air outlet head 23 are sleeved on the outer periphery of the inner shaft 223 and the outer periphery of the outer shaft 224 respectively, so as to form the corresponding first communication space 3 and the second communication space 4, and further form the second medium conveying channel with the second channel 222, the second air inlet channel and the second air outlet channel. The first air inlet channel and the first air outlet channel are directly communicated with the first channel 221 in the inner shaft 223, forming the first medium conveying channel.

[0050] It is easy to understand that the inner diameter of one end of the air inlet head 21 is smaller than that of the other end of the air inlet head 21, and the inner diameter of one end of the air outlet head 23 is smaller than that of the other end of the air outlet head 23.

[0051] Exemplarily, the first air inlet channel and the first air outlet channel are respectively communicated with the first air inlet pipe 211 and the first air outlet pipe 231, and are arranged on the end face of the air inlet head 21 or the air outlet head 23, and one end of each of the first air inlet pipe 211 and the first air outlet pipe 231 is sleeved with a connecting piece, and each connecting piece is fixed on the end face of the air inlet head or the air outlet head, so that the installation of the first air inlet pipe 211 and the first air outlet pipe 231 is facilitated, and the first medium conveying channel is also facilitated to input and output the medium. In addition, the second air inlet channel and the second air outlet channel are respectively communicated with the second air inlet pipe 212 and the second air outlet pipe 232, the second air inlet pipe 212 is inserted into the side face of the air inlet head 21, and the second air outlet pipe 232 is inserted into the side face of the air outlet head 23, so as to facilitate the second medium conveying channel to input and output the medium. That is to say, through the above installation, not only the communication of the air inlet pipe with the air inlet channel and the air outlet pipe with the air outlet channel can be realized, but also a larger spacing between the two air inlet pipes and the two air outlet pipes can be ensured, so as to facilitate independent air supply, and the mutual interference in the disassembly process is avoided.

[0052] It should be noted that the air inlet position of the air inlet head 21 and the air outlet head 23 is not limited to the combination of the end face air inlet and the side face air inlet, and the end face two-way air or the side face two-way air can be achieved by modifying the structure.

[0053] In addition, the medium in the first medium conveying channel and the second medium conveying channel can be a vacuum airflow or a liquid, and the utility model does not limit this.

[0054] In one implementation mode of the utility model, the plurality of second channels 222 are arranged in a honeycomb mode on the outer shaft 224, so as to ensure that the air volume communicated when the medium pipeline 22 rotates does not fluctuate, the combined hollow area (the hollow area of the second channels 222 combined together) is close to the hollow area of the shaft center (the area of the first channel 221), so as to ensure that the medium flow of the two medium conveying channels is consistent.

[0055] Exemplarily, the connecting piece, the air inlet head, the air outlet head, the second air inlet pipe 212 and the air inlet head 21, and the second air outlet pipe 232 and the air outlet head 23 are all clamped with sealing pads.

[0056] In addition, the O-shaped sealing ring 26 is arranged between the end of the air inlet head 21 and the end of the inner shaft 223, the end of the air inlet head 21 and the end of the outer shaft 224, the end of the air outlet head 23 and the end of the inner shaft 223, and the end of the air outlet head 23 and the end of the outer shaft 224.

[0057] It is easy to understand that by arranging the plurality of O-shaped sealing rings 26, the leakage of the medium in the communication space from the connection between the inner shaft 223, the outer shaft 224 and the air inlet head 21 and the air outlet head 23 can be avoided. Due to the arrangement of the first air inlet channel and the first air outlet channel, the O-shaped sealing ring 26 between the end of the air inlet head 21 and the end of the inner shaft 223 and the end of the air outlet head 23 and the end of the inner shaft 223 can effectively correspond to separate the first communication space 3 and the first air inlet channel, the second communication space 4 and the first air outlet channel, and avoid the problem of air leakage between the first medium conveying channel and the second medium conveying channel. The O-shaped sealing ring 26 between the other end of the air inlet head 21 and the end of the outer shaft 224 and the other end of the air outlet head 23 and the end of the outer shaft 224 can effectively prevent the medium in the first communication space 3 and the second communication space 4 from leaking to the outside.

[0058] It should be noted that since the air outlet head 23 and the medium pipeline 22 rotate synchronously, the two O-shaped sealing rings 26 arranged on the air outlet head 23 can also be arranged on the stepped end faces of the inner shaft 223 and the outer shaft 224, respectively.

[0059] It should be noted that the first medium conveying channel and the second medium conveying channel in the medium transmission pipeline assembly 2 can also be arranged in other structures. In addition, the number of layers of the medium pipeline 22 in the medium transmission pipeline assembly 2 can be increased, and the internal air inlet and outlet channels of the air inlet head 21 and the air outlet head 23 can be changed to achieve multi-way independent medium transmission. The specific number of the utility model is not limited.

[0060] Figure 4 is an explosion schematic view of the support assembly provided by the embodiment of the utility model, as Figure 4 shown, the support part 11 includes a support frame 111 and a fixed plate 112, the fixed plate 112 is located on the support frame 111, the air inlet head 21 is located on the fixed plate 112, and a plurality of support wheels 12 are arranged on the support frame 111. Among them, the support part 11 plays a supporting role to the support wheel 12, and the fixed plate 112 supports the air inlet head 21.

[0061] Exemplarily, the air inlet head 21 is fixed on the fixed plate 112 by bolts. The air outlet head 23 is fixed on the medium pipeline 22 by bolts.

[0062] Further, the support frame 111 comprises a bottom base 1111, a top base 1112 and two connecting plates 1113, the two connecting plates 1113 are arranged in parallel and spaced apart, two ends of each connecting plate 1113 are detachably connected with the bottom base 1111 and the top base 1112 respectively, and the fixing plate 112 is located on the bottom base 1111. The number of the support wheels 12 is four, two of the support wheels 12 are arranged on the bottom base 1111, and the other two of the support wheels 12 are arranged on the top base 1112.

[0063] In the above embodiment, by arranging two support wheels 12 on the bottom base 1111 and two support wheels 12 on the top base 1112, the upper and lower layer design of the support wheels 12 can be realized, that is, the two lower support wheels 12 play a supporting role, and the two upper support wheels 12 play a lower locking role, which not only facilitates the installation and support of the medium pipeline 22, but also improves the stability of the entire support assembly 1. In addition, the connecting plate 1113 can ensure the position accuracy and layer arrangement between the upper and lower two layers of support wheels 12, so as to ensure that the medium pipeline 22 is limited to the rotation center and the shaking of the rotating mechanism during high-speed rotation and rapid acceleration and deceleration movement is minimized.

[0064] It is easy to understand that when the two lower support wheels 12 are accurately positioned and installed, the medium pipeline 22 can be simply placed and arranged, which not only ensures the high-precision installation of the medium pipeline 22, but also greatly reduces the installation difficulty.

[0065] It should be noted that the number of the support wheels 12 can also be six or eight, and the present application does not limit this.

[0066] Exemplarily, at least one bearing 121 is inserted in each support wheel 12, and each bearing 121 is installed on the support part 11 through a positioning pin 122, so that the reliable installation of the bearing 121 is realized through the positioning pin 122, and the wear of the rotation of the support wheel 12 can be reduced. In addition, a retaining ring 123 is further sleeved on the positioning pin 122, and the retaining ring 123 can play a fixing role on the bearing 121.

[0067] It is easy for those skilled in the art to understand that the above only describes the preferred embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary joint for dielectric transmission, characterized in that, The rotary joint comprises a support assembly and a medium transmission pipeline assembly; The support assembly comprises a support part and a plurality of support wheels, the plurality of support wheels are rotatably arranged on the support part, and a support space is formed between the plurality of support wheels; The medium transmission pipeline assembly comprises an air inlet head, a medium pipeline and an air outlet head, the air inlet head is mounted on the support part, the medium pipeline is inserted into the support space to be supported by the outer periphery of the plurality of support wheels, the medium pipeline is rotatably connected with the air inlet head, one end of the medium pipeline is communicated with an air inlet passage of the air inlet head, and the air outlet head is fixedly connected with the medium pipeline, and an air outlet passage of the air outlet head is communicated with the other end of the medium pipeline.

2. A rotary joint for dielectric transmission according to claim 1, characterized in that, The medium transmission pipeline assembly further comprises a rotary flange, the rotary flange is sleeved on the medium pipeline, and the rotary flange is inserted into the support space, and the outer periphery of the rotary flange is in sliding contact with the outer periphery of each support wheel.

3. A rotary joint for dielectric transmission according to claim 2, characterized in that, The outer periphery of the rotary flange has an annular groove, and the outer periphery of each support wheel is clamped in the annular groove.

4. A rotary joint for dielectric transmission according to claim 1, characterized in that, The medium pipeline has a first passage and a second passage, the air inlet head has a first air inlet passage and a second air inlet passage, the air outlet head has a first air outlet passage and a second air outlet passage, the two ends of the first passage are respectively communicated with the first air inlet passage and the first air outlet passage, and the two ends of the second passage are respectively communicated with the second air inlet passage and the second air outlet passage.

5. A rotary joint for dielectric transmission according to claim 4, characterized in that, The medium pipeline comprises an inner shaft and an outer shaft, the outer shaft is coaxially sleeved outside the inner shaft, the two ends of the inner shaft protrude out of the outer shaft, the first passage is located in the inner shaft and penetrates through the two ends of the inner shaft, and the second passage is a plurality of passages which are arranged in the outer shaft along the outer periphery of the inner shaft in a ring shape and penetrate through the two ends of the outer shaft. One end of the air inlet head and one end of the air outlet head are correspondingly sleeved on the end of the inner shaft, the other end of the air inlet head and the other end of the air outlet head are correspondingly sleeved on the end of the outer shaft, the air inlet head, the inner shaft and the outer shaft form a first communication space, the first communication space is respectively communicated with the second air inlet passage and one end of each second passage, and the air outlet head, the inner shaft and the outer shaft form a second communication space, the second communication space is respectively communicated with the second air outlet passage and the other end of each second passage.

6. A rotary joint for dielectric transmission according to claim 5, characterized in that, O-shaped sealing rings are arranged between the one end of the air inlet head and the end of the inner shaft, the other end of the air inlet head and the end of the outer shaft, the one end of the air outlet head and the end of the inner shaft, and the other end of the air outlet head and the end of the outer shaft.

7. A rotary joint for dielectric transmission according to claim 1, characterized in that, The support part comprises a support frame and a fixed plate, the fixed plate is located on the support frame, and the air inlet head is located on the fixed plate, and the plurality of support wheels are arranged on the support frame.

8. A rotary joint for dielectric transmission according to claim 7, characterized in that, The support frame comprises a base, a top seat and two connecting plates, the two connecting plates are arranged in parallel and at intervals, the two ends of each connecting plate are respectively detachably connected with the base and the top seat, and the fixed plate is located on the base. The number of the support wheels is four, two of which are arranged on the bottom base and the other two are arranged on the top base.

9. A rotary joint for media transmission according to any one of claims 1 to 8, characterized in that At least one bearing is inserted in each of the support wheels, and each of the bearings is installed on the support part through a positioning pin.

10. A rotary joint for media transmission according to any one of claims 1 to 8, characterized in that The air inlet head and the medium pipeline are connected through a rotary bearing.

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